sdong b9f77ba12b When slowdown is triggered, reduce the write rate ... Summary: It's usually hard for users to set a value of options.delayed_write_rate. With this diff, after slowdown condition triggers, we greedily reduce write rate if estimated pending compaction bytes increase. If estimated compaction pending bytes drop, we increase the write rate. Test Plan: Add a unit test Test with db_bench setting: TEST_TMPDIR=/dev/shm/ ./db_bench --benchmarks=fillrandom -num=10000000 --soft_pending_compaction_bytes_limit=1000000000 --hard_pending_compaction_bytes_limit=3000000000 --delayed_write_rate=100000000 and make sure without the commit, write stop will happen, but with the commit, it will not happen. Reviewers: igor, anthony, rven, yhchiang, kradhakrishnan, IslamAbdelRahman Reviewed By: IslamAbdelRahman Subscribers: leveldb, dhruba Differential Revision: https://reviews.facebook.net/D52131		2015-12-23 11:33:15 -08:00
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rocksdb	When slowdown is triggered, reduce the write rate	2015-12-23 11:33:15 -08:00